Subversion Repositories openrisc_2011-10-31

/* mvme-read.c -- read bytes from a input device.

 *

 * Copyright (c) 1996 Cygnus Support

 *

 * The authors hereby grant permission to use, copy, modify, distribute,

 * and license this software and its documentation for any purpose, provided

 * that existing copyright notices are retained in all copies and that this

 * notice is included verbatim in any distributions. No written agreement,

 * license, or royalty fee is required for any of the authorized uses.

 * Modifications to this software may be copyrighted by their authors

 * and need not follow the licensing terms described here, provided that

 * the new terms are clearly indicated on the first page of each file where

 * they apply.

 */

extern int inbyte ();

extern char * __inln ();

/*

 * read  -- read bytes from the serial port. Ignore fd, since

 *          we only have stdin.

 */

int

read (fd, buf, nbytes)

     int fd;

     char *buf;

     int nbytes;

{

  if (nbytes >= 256)

    {

      char *read_end = __inln (buf);

      *read_end = '\n';

      return read_end - buf + 1;

    }

  else

    {

      int i, c;

      for (i = 0; i < nbytes; i++) {

        *buf++ = c = inbyte ();

        if (c == '\n' || c == '\r') {

          buf[-1] = '\n';       /* convert \r to \n */

          buf[0] = '\0';

          break;

        }

      }

      return i;

    }

}